Fix tests, probably rebase issue

lib/src/components/ComponentRegistry.test.tsx

 import { ComponentWrapper } from './ComponentWrapper';
 import { ComponentEventsObserver } from '../events/ComponentEventsObserver';
 import { AppRegistryService } from '../adapters/AppRegistryService';
+import { ComponentProvider } from 'react-native';
 
 const DummyComponent = () => null;
 
   });
 
   it('should not invoke generator', () => {
-    const generator = jest.fn(() => {});
+    const generator: ComponentProvider = jest.fn(() => DummyComponent);
     uut.registerComponent('example.MyComponent.name', generator);
     expect(generator).toHaveBeenCalledTimes(0);
   });